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Equipment INS-101
FM environmental_corrosion_terminal
ISO 14224 mode Terminal corrosion Terminal corrosion
Source synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
环境腐蚀端子
INS-101 · Instrumentation & Safety Instrumented System (SIS)
Related equipment → INS-101
0.82Source conf.
—Evidence conf.
Terminal corrosionISO 14224 mode
1Failure Mechanism
Function:电气连接
Failure cause:潮湿/腐蚀环境
Damage mechanism：端子腐蚀致接触不良/信号异常（IEC 61511 环境要求）
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类).
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:IEC 61511 — Functional safety—Safety instrumented systems · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 1 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
IEC 61511GB/T 21109GB/T 20438IEC 61508ISA 84.00.01ISO 14224:2016API 580GB/T 7826-2012SAE JA1011_202411GB/T 27921-2023
No separate clause reference.
6Derived Analysis (seeded from this FM)
4/4/4FMEA Sev/Occ/Det
0.25RBI λ
0.78Monitor pdet
6 月Insp. int.
Current tasks:端子防腐处理 | 环境密封
RCFA incident:环境腐蚀端子：潮湿/腐蚀环境，后果类型 Operational，严重度 4
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task绝缘/电气试验 + 继电保护定值校核 + 操动机构特性测试; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 泄漏监测 + 密封/填料定期更换, 螺栓热紧固
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=corrosion; electrical; seal_leak
Governing standardsAPI 510API 570API 571API 581API 682GB/T 14285IEC 60034IEEE C57
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。